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DEBT SECURITIES - ACL on Debt Securities Held-To-Maturity (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning Balance			$ 8,571,000
Ending Balance	$ 8,885,000		8,885,000
Municipal Bonds [Member] | PUERTO RICO
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Beginning Balance	12,324,000	$ 8,869,000	8,571,000	$ 8,845,000
Ending Balance	8,885,000	10,685,000	8,885,000	10,685,000
Municipal Bonds [Member] | Held-to-maturity Securities [Member] | PUERTO RICO
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items]
Provision for credit loss expense	$ (3,439,000)	$ 1,816,000	$ 314,000	$ 1,840,000

X

- Definition

Amount of allowance for credit loss for debt security measured at amortized cost (held-to-maturity).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-Subparagraph (a)
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
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-Section 50
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 326
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-URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447

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+ References

No definition available.

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X

- Definition

Amount of expense related to credit loss from transactions other than loan and lease transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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